diff --git a/runtime/syntax/mix.vim b/runtime/syntax/mix.vim
index 9ab98ea..564d344 100644
--- a/runtime/syntax/mix.vim
+++ b/runtime/syntax/mix.vim
@@ -2,7 +2,7 @@
 " Language:	MIX (Donald Knuth's assembly language used in TAOCP)
 " Maintainer:	Wu Yongwei <wuyongwei@gmail.com>
 " Filenames:	*.mixal *.mix
-" Last Change:  2013 Nov 13
+" Last Change:  2017-11-26 15:21:36 +0800
 
 " Quit when a syntax file was already loaded
 if exists("b:current_syntax")
@@ -16,7 +16,7 @@
 
 " Special processing of ALF directive: implementations vary whether quotation
 " marks are needed
-syn match mixAlfParam		#\s\{1,2\}"\?[^"]\{,5\}"\?# contains=mixAlfDirective,mixString nextgroup=mixEndComment contained
+syn match mixAlfParam		#\s\{1,2\}"\?[^"]\{,5\}"\?# contains=mixString nextgroup=mixEndComment contained
 
 " Region for parameters
 syn match mixParam		#[-+*/:=0-9a-z,()"]\+# contains=mixIdentifier,mixSpecial,mixNumber,mixString,mixLabel nextgroup=mixEndComment contained
@@ -46,6 +46,7 @@
 " Opcodes
 syn keyword mixOpcode	NOP HLT NUM CHAR FLOT FIX nextgroup=mixEndComment contained
 syn keyword mixOpcode	FADD FSUB FMUL FDIV FCMP MOVE ADD SUB MUL DIV IOC IN OUT JRED JBUS JMP JSJ JOV JNOV JL JE JG JLE JNE JGE SLA SRA SLAX SRAX SLC SRC nextgroup=mixParam contained skipwhite
+syn keyword mixOpcode	SLB SRB JAE JAO JXE JXO nextgroup=mixParam contained skipwhite
 
 syn match mixOpcode	"LD[AX1-6]N\?\>" nextgroup=mixParam contained skipwhite
 syn match mixOpcode	"ST[AX1-6JZ]\>" nextgroup=mixParam contained skipwhite
@@ -58,7 +59,7 @@
 " Switch back to being case sensitive
 syn case match
 
-" Registers (only to used in comments now)
+" Registers (only to be used in comments now)
 syn keyword mixRegister	rA rX rI1 rI2 rI3 rI4 rI5 rI6 rJ contained
 
 " The default highlighting